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- Title
Effect of microwave sintering on the structural, optical and electrical properties of BaTiO nanoparticles.
- Authors
Vasudevan, R.; Karthik, T.; Selvakumar, D.; Ganesan, S.; Jayavel, R.
- Abstract
BaTiO nanoparticles were prepared by high energy ball milling and subjected to conventional and microwave post sintering at 1,000 °C. From the powder X-ray diffraction results, the synthesized material exhibits strong tetragonality with large c/a ratio. Scanning electron microscope results show the formation of tetragonal shaped BaTiO crystals in the nanometer scale and a significant reduction in the particle size for the microwave sintered sample. The reduced d-spacing of 1.741 Å with high crystallinity for the microwave sintered material is revealed by high resolution transmission electron microscopy analysis. Ultraviolet-visible spectroscopy studies confirm the higher optical band gap (E) of 4.157 eV for the microwave sintered sample. Microwave sintered sample shows a very high dielectric constant of ε = 4,445 with a low dielectric loss as tan δ = 0.0961. Microwave sintered sample exhibit a high polarization maximum of 73 μC/mm with reduced coercivity to be 0.293 kV/mm.
- Subjects
MICROWAVE sintering; CRYSTAL structure; OPTICAL properties of metals; ELECTRIC properties of metals; BARIUM titanate; METAL nanoparticles; X-ray diffraction; SINTERING
- Publication
Journal of Materials Science: Materials in Electronics, 2014, Vol 25, Issue 1, p529
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-013-1620-5